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3 years ago

How many sides does the polygon have? 8 10 12 15

Mathematics

1 answer:

Lynna [10]3 years ago

8 0

Answer:

Step-by-step explanation:

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I’m Literally soo confused

Tcecarenko [31]

3y - 4

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3 0

2 years ago

the half-life of strontium-90 is approximately 29 years. how much of a 500 g sample of strontium-90 will remain after 58 years

Yuliya22 [10]

Answer: 125 g

<u>Step-by-step explanation:</u>

$A = P_o\cdot e^{kt}\\\\\text{First, use the given information to find k:}\\\\\bullet A=\dfrac{1}{2}P_o\\\\\bullet k = unknown\\\\\bullet t=29\text{ years}\\\\\dfrac{1}{2}P_o=P_o\cdot e^{k(29)}\\\\\\\dfrac{1}{2}=e^{k(29)}\qquad divided\ both\ sides\ by\ P_o\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=ln\bigg(e^{k(29)}\bigg)\qquad applied\ ln\ to\ both\ sides\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=29k\qquad simplified-ln\ and\ e\ cancel\ out\\\\\\\dfrac{ln\bigg(\dfrac{1}{2}\bigg)}{29}=k\qquad divided\ 29\ from\ both\ sides\\\\\\-0.0239=k$

$\text{Now, use the following in the equation to solve for A:}\\\\\bullet A=unknown\\\bullet P_o=500\\\bullet k=-0.0239\\\bullet t=58\text{ years}\\\\A=500\cdot e^{(-0.0239)(58)}\\\\.\quad=500\cdot e^{-1.386}\\\\.\quad=125$

8 0

4 years ago

PLEASE HELP ASAP!!! WILL MARK BRAINLIEST

Lina20 [59]

Answer:

Step-by-step explanation:

i think its the two on the bottom

if I'm wrong I'm so sorry

hope this helps

6 0

3 years ago

Read 2 more answers

Can someone please help, ty!!

labwork [276]

The correct answer is 1

8 0

3 years ago

Read 2 more answers

A sample of 900 computer chips revealed that 75% of the chips do not fail in the first 1000 hours of their use. The company's pr

Vaselesa [24]

Answer:

No the evidence is not sufficient

Step-by-step explanation:

From the question we are told that

The sample size is $n = 900$

The sample proportion is $\r p = 0.75$

The population proportion is $p = 0.72$

The Null hypothesis is

$H_o : p = 0.72$

The Alternative hypothesis is

$H_a : p > 0.72$

The level of significance is given as $\alpha = 0.05$

The critical value for the level of significance is $t_{\alpha } = 1.645$

Now the test statistic is mathematically evaluated as

$t = \frac{\r p - p }{ \sqrt{\frac{p(1-p)}{\sqrt{n} } } }$

substituting values

$t = \frac{ 0.75 - 0.72 }{ \sqrt{\frac{0.72 (1-0.72)}{\sqrt{900} } } }$

$t = 0.366$

Since the critical value is greater than the test statistics then the Null hypothesis is rejected which there is no sufficient evidence to support the claim

8 0

4 years ago